adjusted the TPS 2 times and no dice Options

[jsayre914]

I have a 2.0 D-jet setup. The classic bucking at constant speed. I have disconnected the TPS and the car runs super smooth with no bucking at all. The board has been replaced with Dave's board. I have adjusted it as per the pelican article. I have searched and searched. I printed the picture out of what it should look like before you put the cover back on. My adjustment is perfect. My TPS is adjusted right where it should be BUT is still Bucking


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Can there be somthing eles wrong with a TPS other than the correct adjustment??


Should I get another TPS to try it?


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[r_towle]

This is what it needs to look like at rest with the throttle plate closed.
If you look a the board it has different contact areas and those represent different levels of fuel based upon the position of the switch. (hope that makes sense)

Consider that our Djet system is not super flexible and its really a hard coded map of a certain amount of duration to open the injector with almost zero tuneability.

There is a special Idle circuit that you need to make sure is enabled when you have the throttle plate closed and that is the Ohm meter test that verifies that you are resting on the correct idle circuit...if you line up the switch properly, the ohm meter lets you know, then lock it down and forget it.

I have no idea what Pelicans extra step is for, but remember it was not written by Bosch, so I favor the Bosch instructions and it has never steered me wrong.

The reason the switch is adjustable at all is because they made one TPS switch for about 15 cars and each throttle body is a bit different.

This is a set it and forget it switch...its really not adjustable or you doink the whole system.

The best and most perfect way to set the switch is by eye.
Remove the throttle body, pull off the black cover and set the switch while looking at it.
You can verify its properly done with an ohm meter, but visual always works.

Damn, wrong computer....I will find the pic in a second.

Rich